C4A.22 – Merkel cell carcinoma of left ear and external auricular canal
ICD-10-CM 2027 diagnosis code · Melanoma and other malignant neoplasms of skin
ICD-10-CM code
C4A.22
- Code
C4A.22(claims format:C4A22)- Description
- Merkel cell carcinoma of left ear and external auricular canal
- Short description
- Merkel cell carcinoma of left ear and external auric canal
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 2. Neoplasms (C00-D49)
- Block
- C43-C44 Melanoma and other malignant neoplasms of skin
- Parent codes
- C4A › C4A.2
Related codes in C4A.2
Frequently asked questions
What is ICD-10 code C4A.22?
C4A.22 is the ICD-10-CM code for merkel cell carcinoma of left ear and external auricular canal, in the block C43-C44 (Melanoma and other malignant neoplasms of skin).
Is C4A.22 a billable code?
Yes. C4A.22 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does C4A.22 belong to?
It belongs to category C4A – Merkel cell carcinoma.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.